בֹּרִיתbôrîyth

lye, alkali, potash, soap, used in washing (Jeremiah 2:22; Malachi 3:2)

Pronunciation: bo-reeth' · Hebrew/Aramaic (Old Testament) · H1287

Same root

בֹּרbôr · H1253vegetable lye (from its cleansing); used as a soap forwashing, or a flux formetals

Where it appears

Appears 2 times in the Bible.

Jeremiah 2:22 No amount of soap or lye can make you clean. I still see the stain of your guilt. I, the Sovereign Lord, have spoken!
Malachi 3:2 “But who will be able to endure it when he comes? Who will be able to stand and face him when he appears? For he will be like a blazing fire that refines metal, or like a strong soap that bleaches clothes.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).